Adminer
From MoodleDocs
phpMyAdmin is a useful MySQL database administration tool (if you are using MySQL as the database for your Moodle). When installed as part of Moodle, it becomes part of the Moodle interface. It can be found in the site administration block>Server>database link.
Install phpMyAdmin
phpMyAdmin can downloaded from the Modules and plugins database.
To install, just unzip the archive inside the moodle/admin folder. You should end up with a folder in there called 'mysql' in there that contains all the necessary files. Now when you look at your site admin block you will see a new link: Server > Database.
See also
- Using Moodle Remove database access forum discussion